scripts: the rollout and the upstream-key helpers, with the runbook note

shorashim-rollout: restart, wait for 3/3, two consecutive 200s.
upstream-key-set: store a caller's model key for the gate scenario
without echoing it. KOHEN "Rolling out".

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

scripts/upstream-key-set

@@ -0,0 +1,8 @@
+#!/bin/bash
+# Store the caller's model key for the gate scenario: asks for it without echo, writes 0600.
+set -e
+read -rsp "Anthropic key (not echoed): " KEY; echo
+[ -n "$KEY" ] || { echo "empty — nothing written"; exit 1; }
+install -m 600 /dev/null ~/.config/shorashim/upstream_keys
+printf 'anthropic %s\n' "$KEY" > ~/.config/shorashim/upstream_keys
+echo "written ~/.config/shorashim/upstream_keys (0600)"